Rode yesterday in Cadillac, Mi the trails where in very good shape but we need more base but the riding was awesome. Kudo's to the groomers very nice job. I rode with a bunch of "Cat" boys and Polaris boys. We got the racing over with and my 670 did well. Beat two cat 500's with a lot of engine work. Trust me those are the strongest 500 sleds that I have ever seen and they beat a lot of sleds. Those Cat 500's look all stock but they run very well. Ran a 02' 800 ZR and beat him every time. The guy only had 100 miles on and it was not studded. I got him out of the hole and he never caught me. We met up with a guy later and he had a demo 900 Cat. One of the guys with the 500 Cat has a 600 Cat too with a lot of motor work. That 600 killed that 900 Cat. The 900 Cat is pretty nice though. It was beer drinking time so the 670 was put away so I didnt run the 900 cat.